CN117936832A - Self-driven thermal management system for hydrogen production and power generation by fuel reforming - Google Patents
Self-driven thermal management system for hydrogen production and power generation by fuel reforming Download PDFInfo
- Publication number
- CN117936832A CN117936832A CN202311726286.7A CN202311726286A CN117936832A CN 117936832 A CN117936832 A CN 117936832A CN 202311726286 A CN202311726286 A CN 202311726286A CN 117936832 A CN117936832 A CN 117936832A
- Authority
- CN
- China
- Prior art keywords
- way valve
- fuel
- valve port
- heat transfer
- transfer medium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 285
- 238000002407 reforming Methods 0.000 title claims abstract description 75
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 239000001257 hydrogen Substances 0.000 title claims abstract description 31
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 238000010248 power generation Methods 0.000 title claims abstract description 19
- 238000001704 evaporation Methods 0.000 claims description 80
- 238000002485 combustion reaction Methods 0.000 claims description 72
- 230000008020 evaporation Effects 0.000 claims description 69
- 239000007789 gas Substances 0.000 claims description 43
- 238000009833 condensation Methods 0.000 claims description 21
- 230000005494 condensation Effects 0.000 claims description 21
- 238000009834 vaporization Methods 0.000 claims description 10
- 230000008016 vaporization Effects 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 7
- 239000002828 fuel tank Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 230000003071 parasitic effect Effects 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 description 16
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000006057 reforming reaction Methods 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Fuel Cell (AREA)
Abstract
A self-driven thermal management system for fuel reforming hydrogen production power generation, the thermal management system providing thermal management for a fuel reforming hydrogen production power generation device; the thermal management system consists of a fuel medium system and a heat transfer medium system; the heat transfer medium system is connected with the inner part of the heat transfer medium system by loop heat pipes to realize the flow of the heat transfer medium, and the heat transfer medium system exchanges heat with the components in the fuel medium system through the heat transfer medium, so that the heat management of the fuel reforming hydrogen production power generation device is realized. The invention also discloses a corresponding implementation method of the self-driven thermal management system for hydrogen production and power generation by fuel reforming. According to the invention, the heat management requirements of different stages of the system are realized through the three-way valve switching, the pump assembly is not required to be adopted for driving circulation in the working process, and a heater is not required to provide additional heat, so that the system structure is simplified, the parasitic energy consumption of the system is reduced, and the energy utilization efficiency of the system is improved; and the temperature of the heat transfer medium is kept unchanged all the time in the heat exchange process, and the temperature uniformity inside the system is improved.
Description
Technical Field
The invention relates to the technical fields of fuel cells, loop heat pipes and heat management, in particular to a self-driven heat management system and method for hydrogen production and power generation by fuel reforming.
Background
Fuel cells are considered as a novel energy conversion technology that can convert chemical energy stored in fuel into electric energy and thermal energy through electrochemical reaction, and have high energy conversion efficiency. On the basis, the reforming hydrogen production power generation technology can adopt gasoline and diesel oil and various fuels such as alcohols and hydrocarbons, solves the problem of hydrogen sources by integrating the reforming hydrogen production reaction of liquid fuel and the efficient power generation process of a fuel cell, and has wide application prospect.
The existing thermal management system for hydrogen production and power generation by fuel reforming has the defects of large number of components, complex structure and high parasitic energy consumption. In one aspect, the fuel cell stack is a heat-producing component, and the preheating stage requires heating by a heater, and the operation stage requires cooling by a radiator, and the heater, the radiator, and a pump for driving a heat transfer medium consume additional electric power. On the other hand, the conventional heat transfer medium generally adopts heat transfer oil, and the whole heat management system pipeline needs to be filled in during operation, and a buffer tank is also required to be arranged to solve the volume expansion caused by the temperature change, so that the weight and the volume of the system are greatly increased, and in addition, the heat transfer oil has to be accompanied with the temperature change in the heat exchange process, so that the temperature uniformity of the fuel cell stack is poor during operation.
Disclosure of Invention
The invention aims to provide a self-driven thermal management system for generating electricity by hydrogen production through fuel reforming, which provides thermal management for a hydrogen generation device by hydrogen production through fuel reforming and comprises a fuel medium system and a heat transfer medium system; the fuel medium system includes: a fuel vaporization chamber for receiving heat to vaporize fuel to a gaseous state; a fuel reforming combustion chamber for effecting reforming and combustion of fuel; the fuel medium flows between the fuel evaporation chamber and the fuel reforming combustion chamber and between the fuel reforming combustion chamber and the fuel cell stack by adopting fuel pipeline connection; the heat transfer medium system includes: the condensing section is arranged in the fuel evaporating chamber and can exchange heat with the fuel evaporating chamber; the heat exchange section is arranged in the fuel cell stack and can exchange heat with the fuel cell stack; the evaporation section is arranged in the fuel reforming combustion chamber and can exchange heat with the fuel reforming combustion chamber; the condensing section, the heat exchange section and the evaporating section are connected by loop heat pipes to realize the flow of heat transfer medium, and the heat transfer medium system exchanges heat with the fuel medium system through the heat transfer medium.
Preferably, the heat transfer medium system further comprises: the first three-way valve and the second three-way valve; the first three-way valve comprises a first three-way valve port, a second three-way valve port and a third three-way valve port; the first three-way valve port is connected with the condensing section, the second three-way valve port is connected with the heat exchange section, and the third three-way valve port is connected with the evaporating section; the second three-way valve comprises a fourth three-way valve port, a fifth three-way valve port and a sixth three-way valve port; the third three-way valve port is connected with the condensing section, the fifth three-way valve port is connected with the heat exchange section, and the sixth three-way valve port is connected with the evaporating section; the thermal management system correspondingly forms three modes of a preheating stage, an initial starting stage and a stable operation stage by adjusting the on-off of the first three-way valve port, the second three-way valve port, the third three-way valve port, the fourth three-way valve port, the fifth three-way valve port and the sixth three-way valve port.
Preferably, the heat transfer medium system further comprises: a low inlet and a high inlet of a heat transfer medium arranged on the fuel cell stack; one side of the low inlet and outlet of the heat transfer medium is connected with the heat exchange end, and the other side of the low inlet and outlet of the heat transfer medium is connected with the fifth tee valve port; one side of the high inlet and outlet of the heat transfer medium is connected with the heat exchange section, and the other side is connected with the second three-way valve port.
Preferably, the heat transfer medium system further comprises: a first check valve and a second check valve; the first one-way valve is arranged on the loop heat pipe between the evaporation section and the sixth three-way valve port, and the circulation direction of the first one-way valve when the first one-way valve is conducted is towards the evaporation section; the second one-way valve is arranged on the loop heat pipe between the condensing section and the fourth three-way valve port, and the circulation direction of the second one-way valve when the second one-way valve is conducted is towards the fourth three-way valve port.
Preferably, the fuel medium system further comprises: a fuel storage tank for storing fuel; and one end of the fuel pump is connected with the fuel storage tank, and the other end of the fuel pump is connected with the fuel evaporation chamber and is used for providing power for the flow of fuel in the fuel combustion medium system.
Preferably, the fuel medium system further comprises: the reformed gas inlet and the reformed gas outlet are arranged in the fuel cell stack.
Preferably, the fuel reforming combustion chamber is provided with a combustion chamber and a reforming chamber which are not communicated with each other; the combustion chamber inlet is connected with the fuel evaporation chamber; the inlet of the reforming chamber is connected with the fuel evaporation chamber, and the outlet of the reforming chamber is connected with the fuel cell stack through a reforming gas inlet; and a reformed gas outlet on the fuel cell stack is connected with an inlet of the combustion chamber through a fuel pipeline.
Preferably, the second three-way valve port, the third three-way valve port, the fifth three-way valve port and the sixth three-way valve port are opened, and the first three-way valve port and the fourth three-way valve port are closed and switched to a preheating stage; the heat transfer medium system is formed by sequentially connecting an evaporation section, a third three-way valve port, a second three-way valve port, a heat transfer medium high inlet and outlet, a heat exchange section, a heat transfer medium low inlet and outlet, a fifth three-way valve port, a sixth three-way valve port and a first one-way valve to form a closed loop; the fuel medium system is formed by connecting a fuel storage tank, a fuel pump, a fuel evaporation chamber and a combustion chamber through a fuel pipeline in sequence.
Preferably, the first three-way valve port, the third three-way valve port, the fourth three-way valve port and the sixth three-way valve port are opened, and the second three-way valve port and the fifth three-way valve port are closed and switched to an initial starting stage; the heat transfer medium system is formed by sequentially connecting an evaporation section, a third three-way valve port, a first three-way valve port, a condensation section, a second one-way valve, a fourth three-way valve port, a sixth three-way valve port and a first one-way valve to form a closed loop; the fuel medium system is formed by sequentially connecting a fuel storage tank, a fuel pump, a fuel evaporation chamber, a fuel reforming combustion chamber, a reformed gas inlet, a fuel cell stack and a reformed gas outlet; the reformed gas outlet is also connected with the combustion chamber through a pipeline.
Preferably, the first three-way valve port, the second three-way valve port, the fourth three-way valve port and the fifth three-way valve port are opened, and the third three-way valve port and the sixth three-way valve port are closed and switched to a stable operation stage; the heat transfer medium system is formed by sequentially connecting a heat exchange section, a high inlet and a high outlet of the heat transfer medium, a second three-way valve port, a first three-way valve port, a condensing section, a second one-way valve, a fourth three-way valve port, a fifth three-way valve port and a low inlet and a low outlet of the heat transfer medium to form a closed loop; the fuel medium system is formed by sequentially connecting a fuel storage tank, a fuel pump, a fuel evaporation chamber, a reforming chamber, a reformed gas inlet, a fuel cell stack, a reformed gas outlet and a combustion chamber.
The invention has the beneficial effects that:
(1) The self-driven heat management system adopts a gravity-driven loop heat pipe to connect a heat generating component (combustion chamber), a heat using component (evaporation chamber) and a heat generating component (fuel cell stack) together, and realizes the heat management requirements of different stages of the fuel reforming hydrogen production power generation device through pipeline switching. The pump assembly is not required to be adopted for driving circulation in the working process, and the heater is not required to provide additional heat, so that the system structure is simplified, the parasitic energy consumption of the system is reduced, and the energy utilization efficiency of the system is improved.
(2) The self-driven heat management system adopts a phase-change heat transfer technology, the heat transfer coefficient during phase change is far higher than that of the traditional heat transfer oil, and the temperature is kept unchanged all the time in the heat transfer process, so that the quality and the volume of the system can be reduced, and the temperature uniformity in the electric pile is improved.
Drawings
FIG. 1 is a schematic diagram of a self-driven thermal management system for fuel reforming to produce hydrogen and electricity in accordance with the present invention.
FIG. 2 is a schematic diagram of the system operation during the preheating stage in accordance with an embodiment of the present invention.
Fig. 3 is a schematic diagram illustrating the system operation at the initial start-up stage in an embodiment of the present invention.
FIG. 4 is a schematic diagram of the system operation during a steady operation phase in an embodiment of the present invention.
In the figure, a 1-fuel storage tank, a 2-fuel pump, a 3-fuel evaporation chamber, a 4-fuel reforming combustion chamber, a 41-combustion chamber, a 42-reforming chamber, a 5-fuel cell stack, a 51-heat transfer medium low inlet and outlet, a 52-heat transfer medium high inlet and outlet, a 53-reformed gas inlet, a 54-reformed gas outlet, a 61-first check valve, a 62-second check valve, a 71-first three-way valve, a 72-second three-way valve, a 711-first three-way valve, a 712-second three-way valve, a 713-third three-way valve, a 721-fourth three-way valve, a 722-fifth three-way valve, a 723-sixth three-way valve, an 8-loop heat pipe, an 81-condensing section, an 82-heat exchange section, an 83-evaporating section and a 9-fuel pipeline.
In the figure, the solid line represents the fuel medium trend, and the dotted line represents the heat transfer medium trend.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The present invention will be described in detail with reference to the accompanying drawings, wherein a self-driven thermal management system for producing hydrogen from fuel reforming and generating electricity is provided for thermal management of a fuel reforming and generating electricity plant, as shown in FIG. 1; the thermal management system is comprised of a fuel medium system and a heat transfer medium system.
Wherein the fuel medium system comprises: a fuel vaporization chamber 3 for receiving heat to vaporize the fuel into a gaseous state; a fuel reforming combustion chamber 4 for effecting reforming and combustion of fuel; and a fuel cell stack 5 for generating electricity from the reformed fuel. .
The fuel medium system is internally connected by a fuel pipeline 9 (namely, the fuel evaporation chamber 3 and the fuel reforming combustion chamber 4 and the fuel cell stack 5 are connected by the fuel pipeline 9) for fuel flow and reaction.
The heat transfer medium system includes: a condensation section 81 disposed in the fuel evaporation chamber 3 and capable of exchanging heat with the fuel evaporation chamber 3; a heat exchange section 82 disposed in the fuel cell stack 5 and configured to exchange heat with the fuel cell stack 5; the evaporation stage 83 is provided in the fuel reforming combustion chamber 4, and exchanges heat with the fuel reforming combustion chamber 4.
The heat transfer medium system is internally connected by adopting loop heat pipes 8 (namely, the condensation section 81, the heat exchange section 82 and the evaporation section 83 are connected by adopting the loop heat pipes 8), so that the flow of the heat transfer medium is realized, and the heat transfer medium system exchanges heat with the fuel medium system through the heat transfer medium, thereby realizing heat management on the fuel reforming hydrogen production power generation device.
The heat transfer medium system further comprises: a first three-way valve 71, a second three-way valve 72; the first three-way valve 71 comprises a first three-way valve port 711, a second three-way valve port 712 and a third three-way valve port 713; wherein, the first three-way valve port 711 is connected with the condensation section 81, the second three-way valve port 712 is connected with the heat exchange section 82, and the third three-way valve port 713 is connected with the evaporation section 83. The second three-way valve 72 includes a fourth three-way valve port 721, a fifth three-way valve port 722, and a sixth three-way valve port 723; wherein, the fourth three-way valve port 721 is connected with the condensing section 81, the fifth three-way valve port 722 is connected with the heat exchange section 82, and the sixth three-way valve port 723 is connected with the evaporating section 83.
In a specific embodiment, the heat transfer medium system further comprises: a low heat transfer medium inlet and outlet 51 and a high heat transfer medium inlet and outlet 52 provided in the fuel cell stack 5. One side of the low inlet and outlet 51 of the heat transfer medium is connected with the heat exchange end 82, and the other side is connected with the fifth three-way valve port 722; one side of the high inlet and outlet 52 of the heat transfer medium is connected with the heat exchange section 82, and the other side is connected with the second three-way valve port 712, so that the inflow and outflow of the heat transfer medium in the heat exchange section 82 are realized.
The condensation section 81, the heat exchange section 82 and the evaporation section 83 can be communicated with each other by adjusting the on-off of the three-way valve ports of the first three-way valve 71 and the second three-way valve 72. Specifically, the condensing section 81 and the heat exchanging section 82 may form a closed loop through the first three-way valve port 711, the second three-way valve port 712, the fourth three-way valve port 721, and the fifth three-way valve port 722. The condensing section 81 and the evaporating section 83 may form a closed loop through the first three-way valve port 711, the third three-way valve port 713, the fourth three-way valve port 721, and the sixth three-way valve port 723. The heat exchange section 82 and the evaporation section 83 can form a closed loop through a second three-way valve port 712, a third three-way valve port 713, a fifth three-way valve port 722 and a sixth three-way valve port 723.
The heat transfer medium system further comprises: a first check valve 61 and a second check valve 62, wherein the first check valve 61 is disposed on the loop heat pipe 8 between the evaporation section 83 and the sixth three-way valve port 723, and the circulation direction of the first check valve is toward the evaporation section 83 when the first check valve is turned on; the second check valve 62 is disposed on the loop heat pipe 8 between the condensation section 81 and the fourth three-way valve port 721, and the flow direction of the second check valve is oriented toward the fourth three-way valve port 721 when the second check valve is turned on. The check valve functions to flow the heat transfer medium generated from the evaporation section 83 or the heat exchange section 82 at the time of the evaporation, in a fixed direction, thereby driving the heat transfer medium in the entire heat transfer medium system to circulate in a set direction.
In a specific embodiment, the flow direction of the heat transfer medium in the evaporation section 83 and the condensation section 81 is kept unchanged during operation, and the flow direction of the heat transfer medium in the heat exchange section 82 is opposite when in use for evaporation and when in condensation. In the circulating process, the liquid heat transfer medium formed by condensing the gaseous heat transfer medium in the condensing section 81/the heat exchange section 82 returns under the action of gravity, and a pump assembly is not required to be adopted for driving circulation; and the heat required for the vaporization of the liquid heat transfer medium is provided by the combustion chamber 41 and the fuel cell stack 5, without the need for a heater to provide additional heat.
As shown in fig. 2 to 4, the fuel combustion system further includes a fuel tank 1 for storing fuel; a fuel pump 2, connected at one end to the fuel tank 1 and at the other end to the fuel vaporization chamber 3, for powering the flow of fuel in the fuel medium system.
In a specific embodiment, the fuel combustion system further comprises: a reformed gas inlet 53 and a reformed gas outlet 54 provided on the fuel cell stack 5 for flow of the reformed gas into and out of the fuel cell stack 5.
Specifically, a combustion chamber 41 and a reforming chamber 42 are provided in the fuel reforming combustion chamber 4; the combustion chamber 41 is connected with the fuel evaporation chamber 3, receives liquid fuel passing through the fuel evaporation chamber 3 from the fuel storage tank 1 under the action of the fuel pump 2, and the liquid fuel is burnt in the combustion chamber 41 to release heat; one end of the reforming chamber 42 is connected with the fuel evaporation chamber 3, the other end is connected with the fuel cell stack 5 through the reformed gas inlet 53, the gaseous fuel evaporated from the fuel storage tank 1 through the fuel evaporation chamber 3 under the action of the fuel pump 2 is received, and after being reformed in the reforming chamber 42, the gaseous fuel enters the fuel cell stack 5 through the reformed gas inlet 53, and because of the existence of the reforming chamber 42, the fuel entering the fuel cell stack 5 can be ensured to be the gaseous fuel which can be used by the fuel cell stack 5. Wherein the combustion chamber 41 is used only for exothermic heat of reaction; the reforming chamber 42 and the combustion chamber 41 are both located inside the fuel reforming combustion chamber 4, but are separated from each other and do not communicate with each other.
In order to utilize the unreacted reformed gas in the fuel cell stack 5, a branch which is also realized by adopting the fuel pipeline 9 is arranged between the reformed gas outlet 54 on the fuel cell stack 5 and the inlet of the combustion chamber 41 so as to connect the fuel cell stack 5 and the combustion chamber 41, the branch only allows the gaseous fuel to pass through, and the unreacted reformed gas in the fuel cell stack 5 can enter the combustion chamber 41 through the reformed gas outlet 54 to burn and release heat, so that the fuel utilization rate is improved.
In a specific embodiment, three modes of a preheating stage, an initial starting stage and a stable operation stage are realized by adjusting different working modes of the heat transfer medium system correspondingly formed by the first three-way valve port 711, the second three-way valve port 712, the third three-way valve port 713, the fourth three-way valve port 721, the fifth three-way valve port 722 and the sixth three-way valve port 723; at the same time, in each mode, only two sections of the condensation section 81, the heat exchange section 82 and the evaporation section 83 work simultaneously, and the heat exchange section 82 can realize the switching of the evaporation and condensation functions by adjusting the first three-way valve 71 and the second three-way valve 72.
The heat transfer medium needs to have the property of being capable of phase-changing at the operating temperature of the fuel cell stack, when the operating temperature of the fuel cell stack changes, the pressure in a pipeline of the heat transfer medium system can be regulated to enable the heat transfer medium to always phase-change at the operating temperature of the stack, and in a specific embodiment, the heat transfer medium can be water or ethanol.
Three implementation methods corresponding to the above three modes are described in detail below:
1. Preheating stage
As shown in fig. 2, in the warm-up stage of the fuel cell stack 5, the second three-way valve port 712, the third three-way valve port 713, the fifth three-way valve port 722, and the sixth three-way valve port 723 are opened, and the first three-way valve port 711 and the fourth three-way valve port 721 are closed.
At this time, the heat transfer medium system is formed by sequentially connecting the evaporation section 83, the third three-way valve port 713, the second three-way valve port 712, the heat transfer medium high inlet and outlet 52, the heat exchange section 82, the heat transfer medium low inlet and outlet 51, the fifth three-way valve port 722, the sixth three-way valve port 723 and the first check valve 61 to form a closed loop; wherein the heat exchange section 82 acts as a condensing function.
The fuel medium system is formed by connecting a fuel storage tank 1, a fuel pump 2, a fuel evaporation chamber 3 and a combustion chamber 41 in sequence through a fuel pipeline 9.
Specifically, the fuel in the fuel tank 1 flows through the fuel vaporization chamber 3 (here, since the condensation section 81 does not participate in the operation, the fuel passing through the fuel vaporization chamber 3 does not undergo heat exchange, and the fuel is transported only through the fuel vaporization chamber 3) by the fuel pump 2 through the fuel pipe 9 into the combustion chamber 41 of the fuel reforming combustion chamber 4, and is combusted in the combustion chamber 41, thereby releasing heat. The liquid heat transfer medium evaporates to form a gaseous heat transfer medium after the evaporation section 83 absorbs the heat released by the combustion of the fuel in the combustion chamber 41, the gaseous heat transfer medium expands unidirectionally under the limitation of the first check valve 61, enters the heat exchange section 82 from the heat transfer medium high inlet and outlet 52 to exchange heat with the fuel cell stack 5 through the third three-way valve port 713 and the second three-way valve port 712, and is condensed into the liquid heat transfer medium in the heat exchange section 82 to release heat, so that the temperature of the fuel cell stack 5 rises; the condensed liquid heat transfer medium flows out from the heat transfer medium low inlet and outlet 51, returns to the evaporation section 83 through the fifth three-way valve port 722, the sixth three-way valve port 723 and the first one-way valve 61 to form a cycle; this cycle continuously preheats the fuel cell stack 5 to a set temperature.
2. Initial start-up phase
As shown in fig. 3, after the preheating stage, the fuel cell stack 5 is preheated to the operating temperature and has an intake state, and enters an initial start-up stage of the fuel cell stack 5; the first, third, fourth, and sixth three-way ports 711, 713, 721, 723 are opened, and the second, fifth three-way ports 712, 722 are closed.
At this time, the heat transfer medium system is formed into a closed circuit by sequentially connecting the evaporation stage 83, the third three-way valve port 713, the first three-way valve port 711, the condensation stage 81, the second check valve 62, the fourth three-way valve port 721, the sixth three-way valve port 723, and the first check valve 61.
The fuel medium system is formed by sequentially connecting a fuel storage tank 1, a fuel pump 2, a fuel evaporation chamber 3, a fuel reforming combustion chamber 4 (as described above, in this mode, the combustion chamber 41 and the reforming chamber 42 are both provided with fuel), a reformed gas inlet 53, a fuel cell stack 5 and a reformed gas outlet 54; wherein the reformed gas outlet 54 is also connected to the combustion chamber 41 by a branch.
Specifically, the liquid fuel in the fuel tank 1 flows through the fuel vaporization chamber 3 into the combustion chamber 41 of the fuel reforming combustion chamber 4 by the fuel pump 2 through the fuel line 9, and burns in the combustion chamber 41, thereby releasing heat. The liquid heat transfer medium absorbs the heat of the combustion chamber 41 in the evaporation section 83 and evaporates to form a gaseous heat transfer medium; under the restriction of the first check valve 61, the gaseous heat transfer medium expands unidirectionally, enters the condensation section 81 through the third three-way valve port 713 and the first three-way valve port 711 to exchange heat with the fuel subsequently entering the fuel evaporation chamber 3, becomes a liquid heat transfer medium after being condensed in the condensation section 81, and flows back to the evaporation section 83 through the second check valve 62, the fourth three-way valve port 721, the sixth three-way valve port 723 and the first check valve 61 after being condensed, and continuously circulates to provide heat for the fuel evaporation chamber 3.
At this time, due to condensation of the gaseous heat transfer medium in the fuel evaporation chamber 3, the liquid fuel subsequently entering the fuel evaporation chamber 3 absorbs heat and evaporates in the evaporation chamber 3 to form a gaseous fuel; when the outlet of the evaporation chamber 3 becomes fully gaseous, the gaseous fuel is split: part of the gaseous fuel still directly enters the combustion chamber 41 to burn and release heat, the other part of the gaseous fuel enters the reforming chamber 42 to be reformed into hydrogen-rich reformed gas, the hydrogen-rich reformed gas enters the fuel cell stack 5 through the reformed gas inlet 53 by the fuel pipeline 9, after generating electricity and producing heat in the fuel cell stack 5, unreacted reformed gas enters the combustion chamber 41 through a branch from the reformed gas outlet 54 to burn tail gas; the heat generated in the combustion chamber 41 is used for the reforming reaction in the reforming chamber 42 and the evaporation of the liquid fuel in the evaporation chamber 3, thereby effecting the supply of fuel in the start-up phase.
3. Stable operation phase
As shown in fig. 4, in the steady operation stage of the fuel cell stack 5, the fuel cell stack 5 has reached the rated operating point and generates a large amount of waste heat, and it is necessary to prevent the fuel cell stack 5 from overheating, in this mode, the first three-way valve port 711, the second three-way valve port 712, the fourth three-way valve port 721, and the fifth three-way valve port 722 are opened, and the third three-way valve port 713 and the sixth three-way valve port 723 are closed.
At this time, the heat transfer medium system is formed by sequentially connecting the heat exchange section 82, the heat transfer medium high inlet and outlet 52, the second three-way valve port 712, the first three-way valve port 711, the condensation section 81, the second check valve 62, the fourth three-way valve port 721, the fifth three-way valve port 722, and the heat transfer medium low inlet and outlet 51, thereby forming a closed loop, and the heat exchange section 82 has an evaporation function.
The fuel combustion system is composed of a fuel tank 1, a fuel pump 2, a fuel vaporization chamber 3, a reforming chamber 42, a reformed gas inlet 53, a fuel cell stack 5, a reformed gas outlet 54, and a combustion chamber 41, which are connected in this order.
Specifically, the liquid heat transfer medium absorbs the heat generated by the fuel cell stack 5 in the heat exchange section 82 and evaporates into a gaseous heat transfer medium, the gaseous heat transfer medium flows out from the heat transfer medium high inlet and outlet 52 through the second three-way valve port 712 and the first three-way valve port 711 to enter the condensation section 81 under the limitation of the second one-way valve 62, exchanges heat with the fuel in the fuel evaporation chamber 3, and the gaseous heat transfer medium flows back to the heat exchange section 82 from the heat transfer medium low inlet and outlet 51 through the second one-way valve 62, the fourth three-way valve port 721 and the fifth three-way valve port 722 after being condensed into the liquid heat transfer medium in the condensation section 81, so that the heat dissipation of the fuel cell stack 5 is continuously and circularly realized.
At this time, the liquid fuel in the fuel storage tank 1 enters the fuel evaporation chamber 3 under the action of the fuel pump 2, the heat released by the condensation of the gaseous heat transfer medium in the fuel evaporation chamber 3 absorbs heat and evaporates in the fuel evaporation chamber 3 to form gaseous fuel, the gaseous fuel is reformed by the fuel pipeline 9 through the reforming chamber 42 and then enters the fuel cell stack 5 through the reformed gas inlet 53, after the heat is generated in the fuel cell stack 5, the residual gaseous fuel enters the combustion chamber 41 through the branch circuit from the reformed gas outlet 54 for tail gas combustion, and the heat generated in the combustion chamber 41 is used for the reforming reaction in the reforming chamber 42, thereby realizing the fuel supply in the stable operation stage.
While the present invention has been described in detail through the foregoing description of the preferred embodiment, it should be understood that the foregoing description is not to be considered as limiting the invention. Many modifications and substitutions of the present invention will become apparent to those of ordinary skill in the art upon reading the foregoing. Accordingly, the scope of the invention should be limited only by the attached claims.
Claims (10)
1. A self-driven thermal management system for fuel reforming hydrogen production power generation, the thermal management system providing thermal management for a fuel reforming hydrogen production power generation device comprising a fuel medium system and a heat transfer medium system;
The fuel medium system includes: a fuel vaporization chamber (3) for receiving heat to vaporize fuel into a gaseous state; a fuel reforming combustion chamber (4) for effecting reforming and combustion of fuel; and a fuel cell stack (5) for generating electricity from the reformed fuel.
The fuel medium flows between the fuel evaporation chamber (3) and the fuel reforming combustion chamber (4) and between the fuel reforming combustion chamber (4) and the fuel cell stack (5) through connection of fuel pipelines (9).
The heat transfer medium system includes: the condensing section (81) is arranged in the fuel evaporation chamber (3) and can exchange heat with the fuel evaporation chamber (3); a heat exchange section (82) which is arranged in the fuel cell stack (5) and can exchange heat with the fuel cell stack (5); an evaporation section (83) which is arranged in the fuel reforming combustion chamber (4) and can exchange heat with the fuel reforming combustion chamber (4);
The condensing section (81), the heat exchange section (82) and the evaporating section (83) are connected by loop heat pipes (8) to realize the flow of heat transfer medium, and the heat transfer medium system exchanges heat with the fuel medium system through the heat transfer medium.
2. A self-driven thermal management system for the production of hydrogen from fuel reforming as defined in claim 1, wherein said heat transfer medium system further comprises: a first three-way valve (71) and a second three-way valve (72);
The first three-way valve (71) comprises a first three-way valve port (711), a second three-way valve port (712) and a third three-way valve port (713); wherein, the first three-way valve port (711) is connected with the condensing section (81), the second three-way valve port (712) is connected with the heat exchange section (82), and the third three-way valve port (713) is connected with the evaporating section (83);
The second three-way valve (72) comprises a fourth three-way valve port (721), a fifth three-way valve port (722) and a sixth three-way valve port (723); wherein the fourth three-way valve port (721) is connected with the condensing section (81), the fifth three-way valve port (722) is connected with the heat exchange section (82), and the sixth three-way valve port (723) is connected with the evaporating section (83);
The thermal management system correspondingly forms three modes of a preheating stage, an initial starting stage and a stable operation stage by adjusting the on-off of the first three-way valve port (711), the second three-way valve port (712), the third three-way valve port (713), the fourth three-way valve port (721), the fifth three-way valve port (722) and the sixth three-way valve port (723).
3. A self-driven thermal management system for the production of hydrogen from fuel reforming as defined in claim 2, wherein said heat transfer medium system further comprises: a low heat transfer medium inlet and outlet (51) and a high heat transfer medium inlet and outlet (52) provided in the fuel cell stack (5);
one side of the low inlet and outlet (51) of the heat transfer medium is connected with the heat exchange end (82), and the other side is connected with the fifth three-way valve port (722);
one side of the high inlet and outlet (52) of the heat transfer medium is connected with the heat exchange section (82), and the other side is connected with the second three-way valve port (712).
4. A self-driven thermal management system for the production of hydrogen from fuel reforming as defined in claim 2, wherein said heat transfer medium system further comprises: a first check valve (61) and a second check valve (62);
The first one-way valve (61) is arranged on the loop heat pipe (8) between the evaporation section (83) and the sixth three-way valve port (723), and the circulation direction of the first one-way valve when the first one-way valve is conducted is towards the evaporation section (83);
The second one-way valve (62) is arranged on the loop heat pipe (8) between the condensation section (81) and the fourth three-way valve port (721), and the circulation direction of the second one-way valve when the second one-way valve is conducted is towards the fourth three-way valve port (721).
5. A self-driven thermal management system for hydrogen generation and power generation by fuel reforming as defined in claim 4, wherein said fuel medium system further comprises:
A fuel tank (1) for storing fuel;
And one end of the fuel pump (2) is connected with the fuel storage tank (1), and the other end of the fuel pump is connected with the fuel evaporation chamber (3) and is used for providing power for the flow of fuel in the fuel combustion medium system.
6. A self-driven thermal management system for hydrogen generation and power generation by fuel reforming as defined in claim 5, wherein said fuel medium system further comprises: the reformed gas inlet (53) and the reformed gas outlet (54) are provided in the fuel cell stack (5).
7. An autothermal management system for the production of hydrogen from fuel reforming in accordance with claim 6, wherein said fuel reforming combustion chamber (4) has a combustion chamber (41) and a reforming chamber (42) disposed therein that are not in communication with each other;
the inlet of the combustion chamber (41) is connected with the fuel evaporation chamber (3);
the inlet of the reforming chamber (42) is connected with the fuel evaporation chamber (3), and the outlet is connected with the fuel cell stack (5) through the reformed gas inlet (53);
The reformed gas outlet (54) on the fuel cell stack (5) is connected to the inlet of the combustion chamber (41) through a fuel pipe (9).
8. A self-driven thermal management system for hydrogen generation and power generation by fuel reforming according to claim 7, wherein the second three-way valve port (712), the third three-way valve port (713), the fifth three-way valve port (722), the sixth three-way valve port (723) are opened, the first three-way valve port (711), the fourth three-way valve port (721) are closed, and the preheating stage is switched;
The heat transfer medium system is formed by sequentially connecting an evaporation section (83), a third three-way valve port (713), a second three-way valve port (712), a heat transfer medium high inlet and outlet (52), a heat exchange section (82), a heat transfer medium low inlet and outlet (51), a fifth three-way valve port (722), a sixth three-way valve port (723) and a first one-way valve (61) to form a closed loop; the fuel medium system is formed by connecting a fuel storage tank (1), a fuel pump (2), a fuel evaporation chamber (3) and a combustion chamber (41) in sequence through a fuel pipeline (9).
9. A self-driven thermal management system for hydrogen generation and power generation by fuel reforming according to claim 7, wherein the first three-way valve port (711), the third three-way valve port (713), the fourth three-way valve port (721), the sixth three-way valve port (723) are opened, the second three-way valve port (712), the fifth three-way valve port (722) are closed, and the switching is made to the initial start-up phase;
The heat transfer medium system is formed by sequentially connecting an evaporation section (83), a third three-way valve port (713), a first three-way valve port (711), a condensation section (81), a second one-way valve (62), a fourth three-way valve port (721), a sixth three-way valve port (723) and a first one-way valve (61) to form a closed loop;
The fuel medium system is formed by sequentially connecting a fuel storage tank (1), a fuel pump (2), a fuel evaporation chamber (3), a fuel reforming combustion chamber (4), a reformed gas inlet (53), a fuel cell stack (5) and a reformed gas outlet (54); wherein the reformed gas outlet (54) is also connected with the combustion chamber (41) through a pipeline.
10. A self-driven thermal management system for hydrogen generation and power generation by fuel reforming according to claim 7, wherein the first three-way valve port (711), the second three-way valve port (712), the fourth three-way valve port (721), the fifth three-way valve port (722) are opened, the third three-way valve port (713), the sixth three-way valve port (723) are closed, and the stable operation phase is switched;
the heat transfer medium system is formed by sequentially connecting a heat exchange section (82), a heat transfer medium high inlet and outlet (52), a second three-way valve port (712), a first three-way valve port (711), a condensing section (81), a second one-way valve (62), a fourth three-way valve port (721), a fifth three-way valve port (722) and a heat transfer medium low inlet and outlet (51) to form a closed loop;
The fuel medium system is formed by sequentially connecting a fuel storage tank (1), a fuel pump (2), a fuel evaporation chamber (3), a reforming chamber (42), a reformed gas inlet (53), a fuel cell stack (5), a reformed gas outlet (54) and a combustion chamber (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311726286.7A CN117936832A (en) | 2023-12-15 | 2023-12-15 | Self-driven thermal management system for hydrogen production and power generation by fuel reforming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311726286.7A CN117936832A (en) | 2023-12-15 | 2023-12-15 | Self-driven thermal management system for hydrogen production and power generation by fuel reforming |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117936832A true CN117936832A (en) | 2024-04-26 |
Family
ID=90754567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311726286.7A Pending CN117936832A (en) | 2023-12-15 | 2023-12-15 | Self-driven thermal management system for hydrogen production and power generation by fuel reforming |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117936832A (en) |
-
2023
- 2023-12-15 CN CN202311726286.7A patent/CN117936832A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Nguyen et al. | Proton exchange membrane fuel cells heat recovery opportunities for combined heating/cooling and power applications | |
| JP5616064B2 (en) | Fuel cell heat exchange system and method | |
| CN110171553B (en) | Comprehensive utilization system for waste heat of hydrogen fuel cell power ship | |
| CN110635150B (en) | Thermal management system and method for combination of multiple fuel cell modules | |
| JP2002083624A (en) | Fuel cell system having thermally integrated isothermal cleaning subsystem of co | |
| CN105576269A (en) | Thermal control system of fixed mini-type fuel cell cogeneration device | |
| EP3732743B1 (en) | Energy production assembly coupling a fuel cell and a reversible thermodynamic system | |
| JPH1197044A (en) | Fuel cell and hot water supply cogeneration system | |
| CN109935855A (en) | A kind of operation method of reforming fuel cell system | |
| CN111106364A (en) | Fuel cell power generation system | |
| CN106839426A (en) | The high-temperature heat-pump water-heater that one proton exchanging film fuel battery drives | |
| JP2016515190A (en) | Heating equipment and method of operating heating equipment | |
| CN117936832A (en) | Self-driven thermal management system for hydrogen production and power generation by fuel reforming | |
| CN114244274B (en) | Photovoltaic photo-thermal and thermoelectric power generation coupling system with combined heat and power generation | |
| CN113530626B (en) | Fuel cell waste heat power generation system based on organic Rankine cycle | |
| US10907512B1 (en) | Electric power generating system | |
| CN112539145A (en) | Solar thermal power generation system based on sensible heat and phase change latent heat composite energy storage | |
| Cao et al. | Performance evaluation of an energy recovery system for fuel reforming of PEM fuel cell power plants | |
| CN110690478B (en) | Thermal management system and method for combination of multiple fuel cell modules | |
| WO2019073177A1 (en) | Heat-exchanger system, in particular for a solar trigeneration | |
| CN219433883U (en) | Electricity storage and heat storage system | |
| CN218918959U (en) | Combined heat and power system | |
| CN220038585U (en) | System for improving heat storage capacity of water tank | |
| CN114251863B (en) | Distributed energy supply system and operation method thereof | |
| CN114204071A (en) | Liquid fuel cell system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination |